TS EN 736-2

TS EN 736-2 is a terminology standard that standardises the names of valve components and their definitions. Its purpose is to create a uniform technical language for parts used across different valve types, so that the same component is identified consistently in design, purchasing, maintenance, and documentation.

Why valve component terminology matters

Valves are devices used to start, stop, direct, or regulate flow in fluid systems, and their internal and external parts such as the body, bonnet, stem, disc, seat, and sealing elements have a direct influence on function and performance. This part of the terminology series focuses on the common components that appear across more than one valve type. In practice, that helps engineers and users refer to the same part in the same way, even when the valve design or service application differs.

Where the scope stops

The standard provides names and definitions for valve components, but it does not replace the product or performance standards that cover parts specific to a single valve type. From a general technical perspective, this distinction is important because common terminology improves consistency across catalogues, drawings, and maintenance instructions, while individual valve families may still include specialised parts determined by their operating principle.

• Provides a common terminology for shared valve components.
• Defines component names and definitions.
• Does not gather type-specific valve terms into this document.
• Is intended to be used alongside product and performance standards.